Explanation

FCC (Face-Centered Cubic) lattice is the reciprocal lattice of the BCC (Body-Centered Cubic) lattice.

Explanation

The quality of public healthcare "depends" on the amount of money allocated to it.

Explanation

In a simple model, the unforced rising of hot air can be attributed to the low specific heat of air.

Explanation

The rates of loss of heat are in the ratio of the squares of their radii: r^2 1 /r^2 2.

Explanation

The professor told her students about the project months in advance so that they would have "ample" time to complete their work.

Explanation

• For a vector field to be solenoidal, its divergence must be zero. The divergence of a vector field A = (x + 3y)i + (y - 2z)j + (x + mz)k is given by ∇ ⋅ A = ∂(x + 3y)/∂x + ∂(y - 2z)/∂y + ∂(x + mz)/∂z.
• Calculating the divergence:
  
• ∇ ⋅ A = 1 + 1 + m
• For the field to be solenoidal (∇ ⋅ A = 0), m must be -2.

Explanation

The statement "Highly polished mirror surfaces are very good radiators" is wrong.

Explanation

When the stress applied to the body is increased beyond the maximum value and then removed after some time, the body will "not be able to return to its original position." This situation is known as plastic deformation, where the body undergoes permanent deformation.

Explanation

The average translational kinetic energy of molecules is directly proportional to the temperature (in Kelvin).

Since the temperature is increased from 300 K to 750 K, the average translational kinetic energy will also increase by a factor of 750/300 = 2.5.

So, the average translational energy at 750 K will be:

6 x 10^-20 J x 2.5 = 1.5 x 10^-19 J

Explanation

The repeatable entity of a crystal structure is known as a "unit cell."